3Si's tech stack
What does 3Si use?
3Si (3si.es) uses at least 7 tools we can see from public records, including Microsoft 365 for email and documents and WordPress for its website. Last checked .
- Industry
- Education Management
- Size
- 11–50 employees
- Based in
- Sevilla, Spain
- Founded
- 2009
- Company page
- Tools found
- 7
- Categories
- 3
- Layers
- 3 of 5
- Last checked
- Oct 2026
3Si's stack, layer by layer
Each tool links to the other companies we've found using it. The label says what kind of public trace gave it away.
Application
2 tools, what the product is built with
Media & UI
Go-to-market
2 tools, how they find and keep customers
Website & CMS
Company Ops
3 tools, what the team runs on day to day
Companies like 3Si also use
Tools common among companies with a similar stack that we haven't found at 3Si.
Companies with a stack like 3Si's
Ranked by shared tools, with rare tools counting more.
MOL Limo - Van autód.Carsharing · 11–50 people3in common
IT Engineering Company Edusoft Ltd SkopjeSoftware · 11–50 people3in common
Elite SellerIT Services · 11–50 people1in common
Goodyear Bicycle TiresConsumer Goods · 11–50 people2in common
International Telegram CompanyTelecommunications · 11–50 people3in common
BearingPointManagement Consulting · 11–50 people2in common
SifaIT Services · 11–50 people1in common
MOCEAN SURF CO.Retail · 11–50 people1in common
More Education Management companies
Other Education Management companies we've checked.
3Si tech stack FAQ
What tools does 3Si use?
As of October 2026, runsonwhat has found 7 tools at 3Si (3si.es) in public records. Application: Google Fonts and Font Awesome. Go-to-market: WordPress and Yoast SEO. Company Ops: Microsoft 365, Google Workspace and Fastmail. Last checked October 29, 2026.
What email provider does 3Si use?
3Si uses Microsoft 365 for email and office software, alongside Google Workspace and Fastmail, according to runsonwhat (October 2026). runsonwhat found Microsoft 365 through email records that authorize Microsoft 365. Microsoft 365 is used by 715,543 companies runsonwhat tracks.
What is 3Si's website built with?
3Si uses WordPress for its website, alongside Yoast SEO, according to runsonwhat (October 2026). runsonwhat found WordPress through WordPress code on 3si.es. WordPress is used by 603,472 companies runsonwhat tracks.
Does 3Si use Google Fonts?
Yes. runsonwhat found Google Fonts at 3Si through Google Fonts code on 3si.es. Google Fonts is a Media & UI tool used by 820,774 companies runsonwhat tracks.
Which companies have a tech stack similar to 3Si's?
The companies with the stacks most like 3Si's are MOL Limo - Van autód., IT Engineering Company Edusoft Ltd Skopje, Elite Seller and Goodyear Bicycle Tires, according to runsonwhat (October 2026). Each shares 1 to 3 tools with 3Si, and rare tools count for more than common ones like Google Workspace, so the match reflects real stack choices.
How does runsonwhat know what 3Si uses?
runsonwhat reads public records only. Of the 7 tools at 3Si, 4 were found through code on 3si.es, 3 through email records. A tool is listed only when a direct record backs it up; DNS is rechecked weekly and 3si.es about monthly.
We read public traces only: DNS and email records, certificate logs, website code and published subprocessor lists. A tool is listed when a direct record backs it up, and dropped when a recheck no longer finds it. Is this your company? See how to opt out.